76 lines
1.6 KiB
JavaScript
76 lines
1.6 KiB
JavaScript
import { expect } from 'chai'
|
|
import u from '../lib'
|
|
|
|
describe('u.map', () => {
|
|
it('applies updates to each item in an array', () => {
|
|
const object = [0, 1, 2]
|
|
const inc = (x) => x + 1
|
|
const result = u.map(inc, object)
|
|
|
|
expect(result).to.eql([1, 2, 3])
|
|
})
|
|
|
|
it('applies updates to each value in an object', () => {
|
|
const object = { a: 0, b: 1, c: 2 }
|
|
const inc = (x) => x + 1
|
|
const result = u.map(inc, object)
|
|
|
|
expect(result).to.eql({ a: 1, b: 2, c: 3 })
|
|
})
|
|
|
|
it('can update with a regular updates object', () => {
|
|
const object = [{ a: 0 }, { a: 0 }]
|
|
const result = u.map({ a: 1 }, object)
|
|
|
|
expect(result).to.eql([{ a: 1 }, { a: 1 }])
|
|
})
|
|
|
|
it('returns the same object if no updates are made', () => {
|
|
const array = [0, 1]
|
|
const ident = (x) => x
|
|
let result = u.map(ident, array)
|
|
|
|
expect(result).to.equal(array)
|
|
|
|
const object = { a: 0 }
|
|
result = u.map(ident, object)
|
|
|
|
expect(result).to.equal(object)
|
|
})
|
|
|
|
it('passes the key or index as the second parameter to the iteratee', () => {
|
|
const object = {
|
|
a: { x: 0 },
|
|
b: [3, 3],
|
|
}
|
|
const setToKey = (_, key) => key
|
|
const result = u.map(u.map(setToKey), object)
|
|
|
|
expect(result).to.eql({
|
|
a: { x: 'x' },
|
|
b: [0, 1],
|
|
})
|
|
})
|
|
|
|
it('can be partially applied', () => {
|
|
const object = {
|
|
b: [3, 3],
|
|
}
|
|
const setToKey = (_, key) => key
|
|
const result = u(
|
|
{
|
|
b: u.map(setToKey),
|
|
},
|
|
object
|
|
)
|
|
|
|
expect(result).to.eql({
|
|
b: [0, 1],
|
|
})
|
|
})
|
|
|
|
it('freezes the result', () => {
|
|
expect(Object.isFrozen(u.map({}, {}))).to.be.true
|
|
})
|
|
})
|